Figure 4

Scheme of the pyrophosphate (PPi) metabolism. The PPi-dependent (red line) and ATP-dependent (blue line) reactions are highlighted. The protein levels of the regulated enzymes are shown in coloured squares, indicating the change of expression (log₂ ratio) for each developmental stage in relation to the 15 mm stage. In sequence order (left to right), stages are displayed from FS, 4 mm, 7 mm, 15 mm, V-100, 110 g/l, and 140 g/l. Different proteins isoforms or subunits are shown as different rows. SuSy, sucrose synthase; UDP-GP, UDP-glucose pyrophosphorylase; PFK-1, phosphofructokinase 1; PFP, pyrophosphate-dependent phosphofructokinase; sPPase, soluble pyrophosphatase; V-ATPase, vacuolar ATPase; PP-ase, vacuolar pyrophosphatase.